Balanced double-acting pump.



w. CAMPBELL, T. A. BALEMAN L s. F. WILSON..

BALANC'D DOUBLE ACTING PUMP.

APPLICATLON FILED J UNE 3. i915.

Patented Nov. 6. 1917.

i attorney NTE ST WILLIAM B. CAMPBELL, THOMAS A. BATEMAN, AND SAMUELFRED WILSON, OF PORTLAND, OREGON.

BALANCED neunte-ACTING PUMP.

Specification of Letters Patent. Patented NOV, 6 1917,

Application filed June 3, 1915. Serial No. 31,885.

To @ZZ whom z't may concern:

vBe it known that we, VILLIAM B. CAMP- BELL, THOMAS A. BATEMAN, andSAMUEL FRED 1V rLsoN, citizens of the United States, residing atPortland, in the county of Multnomah and State of Oregon, have inventedcertain new and useful Improvements in Balanced Double-Acting Pumps; andwe do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to a balanced double acting pump, and has for oneof its objects the provision of a pump so constructed that the fluid inone column assists the raising of the fluid in the other column.

Another object of this invention resides in the provision of a pumphaving its working parts so constructed and arranged, that the fluid inthe columns will balance the working parts of the pump in a manner, thatonly such power is required as will suffice to raise the Huid taken inthe pump at each stroke of the pistons.

And another object of thisA invention resides in the provision of a pumpconsisting of few parts, easy to repair, thus providing a cheap anddurable structure. l

Other objects of this invention will be hereinafter more clearly setforth in the specification, defined in the claims, and illustrated inthe accompanying drawings, in which,

Figure 1 is a top plan view of the invention.

Fig. 2 is a vertical longitudinal sectional view of the invention,showing the detail construction and assembling of the working parts ofthe pump.

Referring to the drawings 1 denotes the base of the pump having arrangedthereon the supporting standard 2 provided at its upper end with thebearing 3. Arranged upon the supporting standard 2 and projectinglaterally therefrom are the oppositely disposed central supportingframes 4 and 5, and also arranged upon the supporting standard 2adjacent the bearing 3 are the laterally projecting upper frames 6 and 7Mounted in the central supporting frame 4 is the pump barrel 8 providedwith the apertured head 9 andthe annular flangeV 10 formed upon the head9 for securing the barrel 8 to the frame 1 in any suitable manner, andwithin the aperture of the head 9 of the barrel 8 are arranged thepacking ring 11 and the gland 12.

Mounted within the upper supporting Vframe 6 is the discharge tube 13having the annular flange 14 at its upper end for suitably securing thetube 13 upon the frame 6. The discharge tube 13 is positioned above thebarrel 8 and extends downwardly in the direction of the barrel 8 butterminates at a point slightly above the head 9 of the barrel 8.Suitably secured to the flange 14 of the discharge tube 13 is one of thefluid columns 15, shown in dotted lines.

Mounted in the central supporting frame 5 is the pump barrel 16 providedwith the apertured head 17, Vand the annular flange 18 upon the head 17for securing the barrel 16 upon the frame 5 in any suitable manner, andwithin the aperture of the head 17 of the barrel 16 are arranged thepacking ring 19 and the gland 20.

Mounted within the upper supporting frame 7 is the discharge tube 21provided with the annular flange 22 at the upper end thereof forsecuring the discharge tube 21 upon the frame 7 in any suitable manner.The discharge tube 21 is positioned above the barrel 16 and extendsdownwardly in the direction of the barrel 16 but terminates at a pointslightly above the head 17 of the barrel 16. Suitably secured to theflange 22 y of the discharge tube 21 is another fluid column 23, shownin dotted lines.

The barrels 8 and 16 arel of greater diameter than the opening oraperture in the respective heads 9 and 17, the opening or aperture-inthe heads 9 and 17 are also of greater diameter than the discharge tubes13 and V21 for the purposes hereinafter described.

Operatively interposed between the barrel l 8 and the discharge ktube 13isthe hollow piston 21 slidably mounted within the packing gland of thehead 9`of the barrel 8 and upon the exterior surfaces of the dischargetube 13. This hollow piston 24 is formed I with the head 25 havingarranged therein an opening approximately equal to the diameter of thedischarge tube 13, the head being further provided with the packing ring26 and the gland 27 for providinga tight joint between the exteriorsurfaces ofthe discharge tube 13 and the head 25 of the piston Y trallyapertured portion v memberot the apertured piston head 311, in y persurface 36 a valve seat upon which is adapted to be ing ring e0-and thegland 11 for ,The stem 30 is ixedly mounted byany suitable means in thecentrally yapertured por-.il

tion 32 of the spider of the valve seat 28, and extends downwardlythrough the cen- 33 ol the spider like which centrally apertured portion33 the stem 30vis ixedluf7 mounted and retainedl therein by the lock nutor head 35. The upof the piston head 34@ provides seated the valve 37,the valve 37 being slidably mounted upon the lower portion of the stem30 and capable of reciprocatory movement upon the stem 30 between thevalve seat 36 of the piston head 3-1 and the bottom surface of the lowerend of the piston 24:.

Operatively interposed between the barrel 16 and the discharge tube 21is the hollow piston 38 slidablv mounted within the packing gland of thehead 17 of the barrel 16 and upon the exterior surfaces of the dis-`charge tube 21. This hollow piston 21 is formed with the head 39 havingarranged therein an opening approximately equal to the diameter of thevdischarge tube 21, the head being further provided with thepackproviding a tight joint between the exterior surfaces of thedischarge tube 21 and the head' 39 of the piston 38 which surrounds thedischarge tube 21 and is slidably mounted thereon. The lower end of thepiston 38 which operates ,wi-thin the barrel 16 is providedV with thespider like apertured valve seat a2 upon which is adapted to be seatedthe valve 43 operating' within the lower port-ion ot the piston 38. Thevalve 13 is slidably mounted A upon the upper portion of the stem 14.which projects into the lower portion of the lpiston 38 and retainedthereon by the lcck nutor head #15. The stem -llis lixedly mounted byany suitable means in the centrally apertured portion -15 of the spiderof the valve seat it2, and extends downwardly through thevcentrallyapertured portion 117 of the spider like member of the apert-ured pistonhead i8, in which centrally apertured portion 47 the stem ed is lixedlymounted -`and retained therein by the lock nut or head 419. The uppersurface 50 of the piston head adapted to be seated the Valve 51, thevalve llbeing slidably mounted upon theflower nexterior portions oftheir of the portion of the stem all and capable ot reciprocatorymovement upon the stem fl--l between the valve seat 50 of the pistonhead 118 and the lbottom surface of the lower end kof the piston 38.

For actuating the hollow pistons 21- and 38, the pistons each haveformed upon the heads 25 and39 vat diametrically opposite pointsthat-runnions52 :and 53 respectively, and pivotally connected to thetrunnions 52 of the piston 2st attheir lower ends are the linkati,V andlikewise pivotally connected to the trunnions piston 38, at their lowerends are theV links. 55. The upper ends ofthe links 5l are nivotall fconnected as at` 56. tothe re'- lating trame are arranged in parallelrelation to each other and hai'e'their central portions piro-tallymounted upon the pro- `yecting ends ot' the shaft which is mounted inthe bearing 3 at the top of the supportingstandard2. The ends of thebars 57 of the oscillating frame adjacent the pivotal points 56 ofthelinks -l are-connected together bv the yoke G0 which has securedcentrally thereon the handle 61 for'actuating the oscillating frame vforoperating the pump.y The. free ends of the bars 57 of the oscillatingtrame adjacent the pivotal points -58 oi" the links 55 may alsozbeconnected'toget-her with a yoke provided with an operatingliandlefsiinilar to the dle 61 if desired. i

The. operation of the pump is as follows By referring to Fig. 2 of thedrawingst yoke 60 andfhan# 1 and assumino` that the aum) has been in;

.continual operation 'for -a sutlicient length of time to be now forcingthe fluid therethrough, the parts at the right hand side of the pump aresho-wn inthe position which they assume when the iuid charged from theupper portion of the barrel 8 into the piston 211 around the valve 29 as`indicated by the arrows, while the lparts at the lett hand side of thepump are shown in the positions which they assume when the Huid is beingtaken in from the lower i portion of the barrelv 16 into the upperportion of thebarrel 16 through the piston head 48 and around the valvel'asindicated by the arrows. The manner in which the liuid is forcedupwardly through the pump will be more clearly understood by assumingthat the parts at the right hand side of the pump have previously Vbeenin the position of the is being dis- 1 parts shown at. the :left handside ol the pump, with the valve 29 being closed in the manner of thevalve d3 and the valve 37 .beingopen in theA manner of the valvelf'517whereby upon the upwardmovenient of the barrel S will be compressedbetween the upper surface of the` piston head 34: and its valve 37andthe inner surface of the head 9 of the barrel 8 and the under surfaceof the piston 2-l and its valve 29. The compression of the fluid'betweenthese partsV is increased in intensity as the respective piston 2st andpiston head 34 continues to move upwardly until the compression of thefluid reaches a point sufiicient to overcome the weight of fluid in theadjacent column whereupon the force of the compressed fluid will elevatethe valve 29 from its seat 2S and upon the upper portion of the stem 30and the fluid in the upper portion of the barrel S rushes through theports of the valve seat 28 around the valve 29 into the piston 2st asindicated by the arrows, and this inflow of the fluid continues untilthe working parts at the right hand side of the pump have reached theiruppermost positions.

After these parts at the right hand side of the pump have reached theiruppermost limit, having been drawn upwardly by the right hand side ofthe oscillating frame through the medium of the link connections 54 withthe piston 24, the parts are now caused to descend by the reversemovement of the oscillating frame and the moment that the piston 24begins to descend, the weight of the fluid in the piston 24, thedischarge tube 13 and the fluid column 15 automatically seats the valve29 against the valve seat 2S thereby closing the ports therein, andthrough the medium of the connecting stem 30 the piston head 34 isforced downwardly simultaneously with the piston 24, and owing t-o theforce exerted upon the under side of the valve 37 by the fluid containedin the lower portion of the barrel 8, the valve 37 is raised upwardlyupon the stem 30 and assumes the position of the valve 51 at the lefthand side of the figure. whereupon the fluid beneath the piston head 34now freely passes through the ports thereof and around the valve 37 in amanner indicated by the arrows in the ports of the piston head Li8 atthe left hand side of the pump, and the fluid thereby enters and fillsthe area in the upper portion of the barrel S in the same manner thatthe area in the upper portion of the barrel 1G is filled, and when thepiston 24 is again raised in the manner above described, repetition ofthe operation takes place.

Of course, it is to be understood that the working parts at the righthand side of the pump, and the Working parts at the left handlside ofthe pump operate alternately with each other, therefore, the mode ofoperation above and'primarily described relative to the parts Aat theright hand side of the pump are equally applicable to the mode ofOperation of the parts at the left hand side 0f the pump, as-theserespective parts are constructed and operate in a similar manner but areonly actuated alternately.

It will further be seen from the above described eonstruction andoperation of the pump that the same is constructed in amanner wherebythe weight of the fluid in the respectivefluid columns 15 and 23, thedischarge Vtubes 13 and 21, and the pistons 2-l and 3S not onlyautomatically seats the respective valves 29 and lf3 immediately afterthe discharge of the fluid from the barrels o-r cylinders 8 and 16 intothe pistons 24 and 38 respectively, but the weight of the fluid againstthe valves 29 and 43 and the valve seats 2S and 42 of the respectivepistons 24 and 38 thoroughly balances the working parts at each side ofthe pump, the weight of the fluid in one column counterbalancing theweight of the'fluid inthe other column. Therefore, the only powerrequired for pumping the fluid to any desired point of discharge is thatsufficient to force the weight of the fluid taken in at each alternatestroke of the pistons of the pump.

vWhile the preferred embodiment of the invention has been herein shownand described, minor alterations and variations may be made therein tomeet the exigencies of the case without departing from the spirit ofthis invention or the scope of the claims.

Having described our invention what we claim as new and desire to secureby Letters Patent, is

1. A pump, comprising a support, open ended barrels centrally mountedupon said support and provided with heads, discharge tubes mounted uponsaid support in superposed relation to said barrels, fluid columnsconnected to said discharge tubes, hollow pistons slidably mounted uponthe exterior of said discharge tubes and within the heads of saidbarrels for operating within said barrels, disks within said barrelsoperatively connected to said pistons, valves and valve seats upon saidhollow pistons and said disks, and means for alternately actuating saidhollow pistons and said disks.

2. A pump, comprising a support, open ended barrels centrally mountedupon said support and provided with heads, discharge tubes mounted uponsaid support in superposed relation to said barrels and of less diameterthan the diameter of said barrels, fluid columns connected to saiddischarge tubes, hollow cylindrical pistons of less diameter than saidbarrels but of greater diameter than said discharge tubes slidably icomounted upon the exterior of said discharge tubes and Within the headsof said barrels for operating Within said barrels, apertured` disksWithin said barrelsy operatively connected with said pistons andcoacting therewith, ooacting pairs, of valves and valve seats.

upon said hollow cylindrical pistons and said apertured disks, and meansfor alternately actuating said pistons and said coact- -ing disks Withinsaid barrels.

3. A pump, comprising a base, a supporting standard thereon, centralsupporting frames upon said standard, upper supporting frames upon saidstandard, a bearingl with said operating frame and actuated thereby, avalve seat in the bottom of each of saidl pistons, a connecting stemviixedly mounted in each of the valve pistonsand projecting from eachside thereof, a valve slidably mounted upon said stem in each of saidpistons for opening and closing said valve seats, a piston headoperating in each of lower end of the respective stems and movablesimultaneously With said pistons, a valve seat in each of said pistonheads, and valves slidably mounted upon said stems for opening andclosing saidvalveseats of said heads.

In'testimony whereof We have signed 'our names to this specificationinthe presence of tivo subscribing Witnesses.

WILLIAM B. CAMPBELL.` THOMASy A. BATEMAN. SAMUEL FRED WILSON.

Witnesses R. R. JOHNSON, T. H. BEVERLY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner af-Patents, Washington, D. C.

seats of said.'

saidgbarrels and secured upon the

